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SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 82: Higgs, Di-Higgs II

T 82.1: Vortrag

Mittwoch, 22. März 2023, 17:30–17:45, HSZ/0105

Constraints on the Higgs boson self-coupling, κλ, and the di-vector boson di-Higgs boson coupling, κ2V, via Higgs boson pair production with the ATLAS detectorJochen Dingfelder1, Tatjana Lenz1, Christopher Deutsch1, and •Fiona Ann Jolly21Physikalisches Institut, Universitat Bonn, Germany — 2Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg

After the discovery of the Higgs boson in 2012, searches for Higgs boson pair production have become valuable in probing the Higgs boson self-coupling, κλ. The dominant mode for Higgs boson pair production is gluon-gluon fusion (ggF) followed by vector boson fusion (VBF), which produces two additional jets in the final state. Both production modes provide access to κλ. In addition, the VBF mode provides access to two other couplings: the quartic HHVV coupling (κ2V) and the Higgs boson-vector boson coupling (κV) with V = W, Z.

In this talk, a search for Higgs boson pair production via ggF and VBF in the bbττ final state (both τ leptons decay hadronically) using 139 fb−1 of proton-proton collisions at 13 TeV recorded with the ATLAS detector, is presented. Expected constraints on κλ and κ2V are obtained after employing a categorisation strategy that separates the VBF and ggF modes in the statistical analysis. In addition, extrapolated results for an integrated luminosity of 3000 fb−1 are given.

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